The spread of liberal democracy and the integration of the world economy are the two main forces driving the world towards the end of history.

"The true sign of intelligence is not knowledge but imagination."

There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.

历史学家是回望过去的先知。

真正的自由在于心灵和思想。

Learning is not a passive process; it involves the active construction of knowledge.

挑战是伪装的机会；用勇气拥抱它们。